If you haven't already made plans to upgrade - this is the time to start thinking of doing so.
Sage will begin to support the current and two prior version and their product retirement schedule is as follows:
Version 3.71 retires 9/30/2010
Version 4.0, 4.05, 4.1 retire 9/30/2011
While remaining on the most current version may not seem an urgent matter - we recommend it so that as new features are incorporated into MAS 90 or MAS 200 the upgrade process is much easier.
In addition staying on the most current version ensures that compatibility problems with new operating systems can be addressed in a timely manner.